Has very interesting details, but ultimately it fails. (spoilers, ofc)
The good: Hopkins, Farrell, scene with Xander Berkeley and the one when Hopkins hugs the kid. It raises a question about 'mercy killing'.
But it went south pretty soon (and I'm even not counting in the horrible spoiler trailer):
1) There is zero reason why the killer and the main character are psychic. It could all be delivered way better if the killer was the medic or someone visiting hospitals instead. The hunt could have been done better and more believable through actual deduction instead of hyper-stylized mumbo-jumbo sequences of vision. I love a good paranormal film, but it was all so secondary and wasted in here.
2) There is no reason whatsoever that someone who calls himself a Samaritan sends any kind of clues to the police or wants to die for that matter. In his mind, he did nothing wrong, so why pay for it?
3) Why did he kill that one person so violently anyway?
4) Who was the shooter at the gallery who died after the crash? Did they ever explain?
5) Unlike I Origins or Age of Adaline, the combination of fantasy and technological procedure here is awful. Everything relies of visions and then we have all those diagnosis and exact data which are frankly ultimately more meaningful.
6) What's with sudden thing that Jefferey Dean Morgan had cancer? Also, since we have two characters with any impact who died from cancer (Morgan and Hopkins' daughter) why not use one of them with question of weather it is right? All random people who would die anyway weren't much of a stake to a viewer. And after Morgan was gone, I knew Cornish would survive. No real threat there.
7) Hopkins' and Farrell's characters just met but because of that 'power' they try to establish them as sworn frennemies? They are not Hannibal/Will or Batman/Joker no matter how much last 10 minutes want us to believe that. Hence, villain's death had no impact either.
8) I don't recall there being any hint of Hopkins killing his daughter before the twist in the last scene. It just came out of nowhere.